迳流式水电站属（）水电站，水来多少就只能用多少，因此，迳流式电站只能承担（）部分。
参考答案：无调节；基荷
It is reported that many a new house ______ at present in the disaster area.
A．are being built
B．were being built
C．was being built
D．is being built
增强桩冠固位的方法，以下错误的是（）
A.不破坏根尖封闭的前提下尽量延长桩
B.尽量多保存余留牙体组织
C.根管预备成圆柱形
D.减小桩的锥度
E.增加桩的直径
